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Finding the Fourth Proportional to 79,686.74, 119,529.30 and 20,522.18

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Solution

The fourth proportional to 79,686.74, 119,529.30 and 20,522.18 is: 30,783.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,686.74 : 119,529.30 = 20,522.18 : x
  2. Step 2: Convert to fraction form
    79,686.74/119,529.30 = 20,522.18/x
  3. Step 3: Cross multiply
    79,686.74x = 119,529.30 × 20,522.18
  4. Step 4: Simplify right side
    79,686.74x = 2,453,001,809.87
  5. Step 5: Solve for x
    x = 2,453,001,809.87/79,686.74
  6. Step 6: Final answer
    x = 30,783.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.